Further observational evidence for a critical ionizing luminosity in active galaxies
We report the results of a survey for H I 21-cm absorption at redshifts of z ≳ 2.6 in a new sample of radio sources with the Green Bank and Giant Metrewave Radio Telescopes. From a total of 25 targets, we report zero detections in the 16 for which optical depth limits could be obtained. Based upon t...
| Main Authors: | , , , , , , |
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| 格式: | Journal article |
| 語言: | English |
| 出版: |
Oxford University Press
2017
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